Two Beam Curvature Visualizer

An interactive, browser-based visualizer that uses two “perfectly level” beams to show why local level lines aren’t parallel on a curved Earth. Tweak distance, Earth radius, and refraction (k) to watch the beams intersect above the midpoint—complete with presets (incl. Bedford Level) and live formulas.

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two_beam_curvature_visualizer_v1_0_7.html 15 kB

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